Blog tagged as J1939

As we’ve seen throughout this series, a CAN frame is intentionally simple: 11 or 29 bits of identifier, data payload. This minimalism makes CAN fast, deterministic, and flexible—but it also means that different industries needed ways to define what those bytes represent.

J1939 was specifically designed for the needs of the commercial vehicle industry, ensuring reliable and real-time data transmission in harsh environments like trucks, buses, and construction machinery.